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8532321 
Journal Article 
Improved steady-state photoluminescence derived from the compensation of the charge-imbalance in Ca3Mg3(PO4)(4):Eu3+ phosphor 
Nair, GB; Kumar, A; Swart, HC; Dhoble, SJ; , 
2019 
1 
Ceramics International
ISSN: 0272-8842
EISSN: 1873-3956 
ELSEVIER SCI LTD 
OXFORD 
21709-21715 
WOS:000493212500082 
This work focuses on the charge-compensation effects produced by different monovalent alkali ions, viz. Li+, Na+, K+, and the vacancy defects in the Eu3+-activated Ca3Mg3(PO4)(4) host. To compensate the extra charge produced due to doping of Eu-3(+) ions in the Ca2+ site, two approaches were adopted. In the first approach, a Ca2+ vacancy (square(+)) was deliberately created in such a way that three Ca2+ ions were removed for doping of every two Eu3+ ions. In the second case, a monovalent alkali ion (Li+, Na+ or K+) was incorporated along with one Eu(3+ )ion to replace two Ca2+ sites in the host. Sol-gel/Pechini method was employed for the synthesis. The luminescence emissions of Ca3Mg3(PO4)(4);Eu3+ phosphor significantly improved with the introduction of charge-compensators. The remarkable enhancement in the emission intensity of the charge-compensated samples was accompanied by noteworthy improvement in the color purity of their emissions.